Liverpool legend John Aldridge has slaughtered Chelsea striker Diego Costa.

Costa grabbed the winner against Norwich City on Saturday.

But Aldo wrote in the Sunday World: "What has happened to Chelsea striker Diego Costa?

"Well, he has turned into a bit of a p***k if you ask me and his decline has been symptomatic of everything that has gone wrong at Chelsea.

"Regular readers of my Sunday World column will know that I'm not an admirer of the way Jose Mourinho goes about his business, so he won't get any sympathy from me following his dramatic fall from grace.

"Yet I liked the way Costa went about his work in his first campaign as a Premier League player and it does surprise me that he is struggling so badly.

"Costa is a rugged, old fashioned centre-forward. I saw something of myself in him in the way he likes a battle with defenders and finds a way to score goals on days when things are not going his way, but that has all changed.

"A little like his annoyingly aggressive manager, Costa has behaved like an idiot for much of this season and he is getting just what he deserves for his troubles – bugger all!"